The S&P 500 plunged 3.3 percent between Friday, January 22, and Friday, January 29. It was the biggest weekly decline since October, with 85 percent of the index’s members losing value. The selloff also dragged stocks into negative territory on a year-to-date basis.
The video-game retailer entered the session with a year-to-date gain of over 1,600 percent, propelled by a short squeeze of epic proportions. Seconds after 10 a.m. ET, it reached a high of $483. GME then reversed and plunged 77 percent to $112.25 by 11:25 a.m. before bouncing.